Integral process for preparing acetylene by means of continuous coking of coal and plasma pyrolysis

A plasma and combined process technology, applied in the field of coal chemical industry and one-carbon chemistry research, can solve the problems of poor energy utilization rate, achieve the effect of reducing refining cost and energy consumption, simplifying the coking process, and increasing the yield of acetylene

Inactive Publication Date: 2002-11-20
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0004] From the direct plasma pyrolysis of coal to acetylene and the continuous coking process, there are defects in the effective utilization of energy, but the energy utilization of the two processes is complementary

Method used

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Examples

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Embodiment Construction

[0008] The invention is illustrated by the following examples.

[0009] In an embodiment, the coal is continuously fed into the vertical continuous coking furnace with a screw conveyor at a pressure of 0.01MPa-0.5MPa, and the coal moves downward under the action of gravity. After preheating, softening, and dry distillation in the middle fire channel, a section of hydrocarbon-rich pyrolysis gas at 400°C-800°C is released. The dry distillation semi-coke continues to move down into the carbonization section for high-temperature calcination to release the second-stage hydrogen-rich pyrolysis gas at 1000°C-1300°C to form high-temperature coke. The high-temperature coke enters the liquid-sealed coke quenching tank after being quenched by dry method, and finally is scraped out by a scraper coke discharge machine to obtain coke. Part of the second-stage hydrogen-rich pyrolysis gas at 1000°C-1300°C is introduced into the plasma generator for plasma pyrolysis to produce acetylene as a ...

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Abstract

The present invention adopts the external heating process to heat coal and makes coal continuously coke, so that its first-stage high-temp. pyrolyzed gas can be directly used as raw material for preparing acetylene by means of plasma pyrolysis, and its second-stage high-temp. pyrolyzed gas can be used as flow-forming gas for preparing acetylene by means of plasma pyrolysis. Said invention can utilize low energy consumption to produce acetylene and coke, and the partial high-temp. pyrolyzed gas and acetylene tail gas can be used as heating fuel for continuously coking coal.

Description

1. Technical field [0001] The invention discloses a coal continuous coking and plasma pyrolysis combined process for producing acetylene, which belongs to the research field of coal chemical industry and one-carbon chemistry. 2. Background technology [0002] Using a plasma reactor to directly produce acetylene from pulverized coal can fundamentally solve the pollution problem of "three wastes". More importantly, the power consumption per kilogram of acetylene is equivalent to that of the calcium carbide method, and coke and limestone are not required as raw materials. Since my country's coal reserves are quite rich and oil resources are short, the development of coal chemical industry has special significance for the development of my country's chemical industry. However, due to the inherent characteristics of coal, direct plasma pyrolysis of coal to acetylene makes it more difficult to solve the problems of yield, energy consumption and long-term operation. First of all,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/24C10B57/00
Inventor 谢克昌田原宇鲍卫仁姜少华林建英
Owner TAIYUAN UNIV OF TECH
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